Pump



May 4, 1929. J, M SHIMER 1,712,969

PUMP Filed Dec. 16, 1927 4 SheetsfShee-t 2.

u uw 7s@ l1 fITORNEYS.

J. M. SHIMER May M., ma

PUMP

Fild Dec. 16 4 'sheersheet IN V EN TOR.

7M) ATTORNEYS.

J. M. SHIMER May 14, i929 PUMP Filed DEC` 16, 1927 4 SlleetS-Shee*Lv INVENTR.

NQ.) ATTORNEYS.

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.application tiled llecember ltr, will'. teriaI No. ltttfl't.

llliis invention relates to pumps and more particularly to hot oil pumps such as are employed in petroleum relining and oil cracking plants. s

lllumps ot this type are employed tor cirm culating oil at a temperature ot 6000 to 800O ll.,- and one Vot the principal dithculties encountered in building a pump tor use with such het liquids has been the laclr ot a successtul method ot paclring the pump pluno'er against the lealrage ot the hot liquid. lit t ie present time, a ticirible asbestos packing seems to be the best material tor such use, but to insure a relatively long lite ol the paclring, both it and the plunger must be cooled to a temper'- ature ot at least 3000 or /lOOo l?.

rlrn object et this invention is to provide a pump having an improved mechanism for cooling the pump plunger and associated paclring.

turtlrer object is to provide a mechanism ot' the type set torth which vwill be simple in arrangement rugged in construction and relatively cheap to manufacture and assemble.

llh'eee and other objects which will be apparent to those skilled in this particular art are accomplished by means ot the invention illust rated in the accompanying drawings in which Figure l is a ,sidey elevation ot a double acting pump constructed in accordance with one embodiment et this invention. ldig. 2 is a longitudinal sectional viewxtlirough the pump plunger' and associated mechanism illustrated at the lett in llig.. l.. .llig 3 isa similar view ot the opposite plunger and llig. et is a sectional view similar to ltig. 2 illustrating a ditl'erent way et' carrying out the present invention its illustrated, the present invention is shown in connection with a double acting pump ti having opposed cylinder bores, t' and l5 provided with reciprocating plungers il and tt res:ientirely9 which are simultaneously opl om any desired source ot power suoli7 le9 as a steam cylinder' lll having a l. connected to the cross head l2 ot pump plunger t9, the cross head supported upon a cradle lll slidably unted on the usual rods let. '.lhe opposite .juger ll is reciprocated thi-ou t, the inedia cross head lli sruulorted on a cross slide lll und connected lo the crt s head by tie rode l tor sin lirst plune uit the respect ve plungi rnnurrded wr, i` 'ittclr'n possible.

ing 18 ot any desired type tor preventing leakage ot oil along the plunger' surtace, and mechanism is employed for maintaining the plunger and paclrinp at a temperature sutliciently low to provic e tor relatively long lite ol the packing.

ln the present instance, this cooling is attained by tlushing a cooling medium through the interior ot the hollow plungers. l spider 19 or similar support is mounted upon the cradle supporting rods It between the steam cylinder l() and the adjacent cross head l2, the spider having a hub 2() provided with an opening- 2l through nrich the associated piston rod extends. A liquid supply conduit tor deliver-ing a cooling medium into the interior ot the plunger il is termed by a hollow rod or pipe 22 which is threaded into the hub ot the spider' so as to colnrnruricate directly with inlet passages 23 tor-med therein. lhe liquid sup, ply conduitextends through the cross head l2 and the sliding or telescoping joint between the conduit and the cross head is closed by a packing 2d. The conduit is otl such length as to deliver' a cooling medium as closely adjacent the i nner end ot the associated plunger tl as is rln outlet pipe or conduit 25 is threaded into the hub 20 so as to communicate directly with an outlet 2G termed therein and the outlet conduit has a sliding or telescoping connection witlrthe cross head lll which is sealedby a packing 27A 'llre outlet conduit is substantially shorter than the .inlet conduit so as to withdraw the cooling medium trom the outer end ot the hollow plunger, opposite to the end at which it is supplied.q llt will, et course, be understood that the proper outside connections tor conveying the cooling medil uni to .and troni the inlet and outlet conduits are associated with the inlet and outlet pas sages and 2o7 respectively.II in the spider hub 20. llt is apparent that the sliding connec-'tions between the cross-head l2 and the tluid-conveying conduits and 25 providea in cl'l'ect., llerrible Huid-conveying connections between the passages 23 and 26 and the interior ot the hollow plungero rlhe opposite plunger ll is cooled in the sume manner. bracket Ell is mounted atI the rear ot the associated cross head l5 and an inlet pipeor supply conduit 29 is connected thereto in direct cornnurnication with an inlet port 3U, the conduitlll ertending through the cross head l5 and into the hollow plunger' ll a icicnt distance to deliver the cooling till lill? lill iluid thereto at its inner or hottest end, the flexible connection in the Jform of al sliding or telescoping connection or joint between the cross head and inlet conduit being packed by a suitable packing 30. The outlet pipe 3l is connected to the supporting bracket 29 so as to communicate directly with an outlet port 32 formed therein, the outlet conduit being of such length as to withdraw the cooling Huid from the outer or cooler end ol` the associated plunger. Like the inlet conduit, the outlet conduit 31 extends through the cross head 15 and the slidable joint is packed by suitable packing 33.

It will be readily apparent to those skilled in this particular art that, in the case of a pump under a certain size, the pump plunger-s andy cross heads will be too small to permit the liquid conduits extending through the lat` ter. In this ease, the liquid may be flushed through the plunger by means of connections associated with the lateral laces ot the cross head, instead of connections extending straight; through. As illustrated in Fig. 4, the relatively small plunger is reciprocated by a cross head 36 mounted upon a slide or support 37. The inlet pipe 38 is connected directly to the cross head so as to communicate with an inlet passage 39 'formed by a bore extending laterally outward to the outer 'tace of the cross head. The outer end ot the bore is closed by a plug 40 or the like and an additional passage 41 extends at; right angles `to the passage 39 adjacent the outer edge ot the cross head. A conduit formed by telescoping rods 42 and 43 connects the passage Il with an inlet connection formed by a flanged member 44 having a. passage 45 communicating with the pipe 43 at one end and t'orniing an inlet port 45 at the other. rlhe member 44 is removably mounted on the pump Vl'rame 46. An outlet passage 47 is formed in the cross head by a laterally extending bore closed at its outer end by a plug 48. A second bore 49 communicates directly with the outlet bore 47 and is connected, to an outlet conduit formed by telescoping rods 50 and 5l leading to ari-outlet connection 52, similar in all respects to the inlet connection 44, and providing an outlet port 52. The telescoping lioints between the rods 42 and 43 and the rods 50 and 51 'are packed with the usual packings 53 ot'l any desired forni. It will be observed ,that these telescoping joints provide a flexible fluid-conveying conduit between each ol the inlet and outlet connections and the imerior of the plunger.

Reiter-ring to Figs. l to il, the inlet 23 is connected to any desired source of cooling lluid such, for example, as water, and the outlet 26 in the spider hub 2O is connected to any suitable discharge. The water or other cooling medium is carried by the inlet conduit to the inner or hottest end ot' the plunger and lions backwardly through the plunger to the outlet conduit 25 and outlet 2G. 'lhe constant flushing of the cooling medium through the plunger maintains it and th i associated packing 1S at such a temperature that the liie of the latter is materially prolonged. A much shorter plunger stutling box can be employed than is the case when outside cooling is relied upon, and there is no inward leakage of a Cooling medium into the pump, as is intentionally arranged t'or in some of the stalling boxes employing outside cool ing. The result is that water, the most el'- ficient cooling medium, can be used and the full benetit o lf direct contact between the cool ing medium and thc plunger is obtained, this latter, ol course, not being possible in exterior cooling oi the plunger by wat/cr. rl`hc opera tion ol the opposite plunger tl is similar.

Referring to Fig. 4, the inlet port` Al5 formed in the nozzle or member ll, is connectcd to a source ot supply and the outlet port 52 inthe member 52, is connected to a .suitable discharge. 'l`he cooling medium llou'` through the inlet member ll, the telescoping pipes 42 and lil, the cross passage Il.) in thc cross head to the inlet. conduit 3S. lt is flushed through the plunger and llows ont through the discharge outlets li and Attl vlormed in thc cross head, through the telc- .scoping outlety pipes 5() and 5l and through the. outlet member :i2 to the discharge. lt will be apparent that the same :ulvantagcs arc inherent in this construction as are obtained in the other modiicat ions described.

Although l have set; l'orth cert-.iin specilic tamstructions ol' this invention, it` \vill l s apparent. that various changes, additions, substitutions and omissions can bc made in the .specific details thercol without departing from the spirit ol this invention or the scope ol'` the appended claims.

lVhal. l claim as .new and desire to secure by liietters Patent is:

l. 'ihe combination in a hot oil pump of a. reciprocating hol`.o\v plunger. a cross head associattal therewith, means l'or delivering a cooling medium to the. interior of said pluu ger through said cross head and means tor removing said medium from said plunger through said cross head.

2. rlhe combination in a hot oil pump ol a hollow phniger, a reciprocating crossv head for operating said plunger, a cradle for npporting said cross head` means including passages in said cross head for flushing 1i cool ingincdium through the interior ot said plnn ger, an inlet associated with one ot said pasA sag-es for delivering a tooling medium thereto, an outlet tor another of said passages. means for srauring .said inlety and outlet to the pump trame, and tclescopingl connec lions between said cross head andsaid inlet and outlet.

Il. The. combination in a hoty oil pump of a hollow plunger. a reciprocating croati bear.

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litten-ien tor operuting seid plunger, liquid conveying ducts termed in suid cross heard tor permit ting n cooling medium to be ilushed through suid plungerg e member provided with un inlet port mounted on the treme oil sind pump9 n second member provided with en outlet port mounted on seid treme, und teleu scoping conduits connecting seid members "with the ducts in seid cross heed.

Ll, 'llhe combination in n hot oil pump ot u hollow plunger, u reciprocating cross hend lor operating sind plunger und provided with tlnid psssnges communicnting `with the interior oit seid plunger, removable inlet und outlet connections mounted on the pump treme und telescoping conduits connecting the pnsin seid cross heud with suid members.

o, 'lhe combinution in n pump ot u movuble heed7 e hollovv plunger' ussociuted therewith so us to be operzrted thereby und menne :tor circuleting u cooling medium through the interior oil sai-id plunger including moons tor conveying n cooling medium through sind heed to the end oit seid plunger remote trom seid heed und ineens iler removing seid cooling lluid through sztid heed trom the portion ol seid plunger udincent snid .trend tt, 7lhe combrnntion in n pump olf e hollow plunger, meuns lor reciproceting seid plunger und means lor circulating u cooling lluid through the interior ot seid plunger inclu l ing stationary inlet :md outlet connections und tlerrible duid conveying conduits between sind connections und the interior el Suid plunger.

il., "llhe combination in n` pump oil ai hollow plunger., n reciprocating cross heard associated therewith7 liquid conveying passages formed in seid cross heed 'lor permitting fr cooling medium to be tlushed through suid plungen o stutionnry inlet member, t stationery outlet member und llenible conduits connecting seid members with the pussuges in seid cross heed.

il. 'fllhe combination in o pump oit e reciprocnting cross heed, at hollow plunger rigidly connected thereto und movzible therewith und stationery tluid conveying conduits provided with telescoping connections with sind cross heard lor pussing et cooling tluid through the interior of seid plunger.

lln testimony vvhereoit5 l here hereunto subscribed my nume this llth doy ol llrecember9 will..

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